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A kind of electrofusion additive manufacturing x100 steel grade tee pipe fitting material and its use method

A three-way pipe fitting and additive manufacturing technology, which is applied in the direction of additive manufacturing, additive processing, and process efficiency improvement, to achieve the effects of promoting travel, reducing carbon equivalent, and satisfying impact toughness

Active Publication Date: 2021-07-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of production technology, due to the limitation of the size of the forging blank, the bearing capacity of the press and the processing cost, in terms of high-pressure and large-diameter pipelines, the strength and design wall thickness of the current domestic tee has greatly exceeded the current domestic tee fittings Bearing capacity of hot extrusion production process and equipment

Method used

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  • A kind of electrofusion additive manufacturing x100 steel grade tee pipe fitting material and its use method
  • A kind of electrofusion additive manufacturing x100 steel grade tee pipe fitting material and its use method
  • A kind of electrofusion additive manufacturing x100 steel grade tee pipe fitting material and its use method

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Effect test

Embodiment 1

[0036] A material for X100 steel grade tee pipe fittings manufactured by electrofusion and additive manufacturing, in terms of mass percentage, comprising the following proportions:

[0037] C: 0.06%; Mn: 0.70%; Si: 0.20%; Cr: 1.5%; Mo: 0.5%; Ni: 0.05%; Nb: 0.004%; Cu: 0.02%; Ti: 0.01%; , P≤0.010%; S≤0.005%; the rest is Fe.

Embodiment 2

[0039] A material for X100 steel grade tee pipe fittings manufactured by electrofusion and additive manufacturing, in terms of mass percentage, comprising the following proportions:

[0040] C:0.10%;Mn:1.0%;Si:0.40%;Cr:2.5%;Mo:1.0%;Ni:0.10%;Nb:0.007%;Cu:0.05%;Ti:0.016%;B:≤0.005% , P≤0.010%; S≤0.005%; the rest is Fe.

Embodiment 3

[0042] A material for X100 steel grade tee pipe fittings manufactured by electrofusion and additive manufacturing, in terms of mass percentage, comprising the following proportions:

[0043] C: 0.08%; Mn: 0.85%; Si: 0.30%; Cr: 2%; Mo: 0.75%; Ni: 0.075%; Nb: 0.0055%; Cu: 0.035%; Ti: 0.013%; , P≤0.010%; S≤0.005%; the rest is Fe.

[0044] The invention discloses a method for using electric melting and additive manufacturing of X100 steel grade tee pipe fitting materials, which adopts the electric melting and additive manufacturing technology.

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Abstract

The invention discloses a material for manufacturing X100 steel grade tee pipe fittings by electric melting and additive manufacturing and a use method thereof. The material of the invention adopts a low-carbon and low-manganese composition design, and utilizes Cr and Mo elements through reasonable manganese-silicon ratio regulations. The joint strengthening effect and the ultra-high cooling rate of the electro-fusion additive manufacturing meet the strength requirements of the X100 steel grade. While the steel grade of the material reaches the X100 steel grade, the impact toughness also meets the standard requirements for the tee pipe body. The material of the invention strictly controls the content of carbon elements, effectively reducing the carbon equivalent and cold crack sensitivity of the material.

Description

technical field [0001] The invention belongs to the field of manufacturing high-strength tee pipe fittings, and in particular relates to a material for manufacturing X100 steel grade tee pipe fittings by electromelting and additive manufacturing and a use method thereof. Background technique [0002] Metal additive manufacturing technology (3D printing forming technology) is a brand-new technology developed in the late 1980s. It takes additive manufacturing as its thought and integrates technologies such as numerical control, computer, mechanical engineering and material science to realize three-dimensional Advanced technology for original forming. Materials for metal additive manufacturing are mainly divided into powder materials and wire materials, mainly five kinds of metals including titanium alloy, aluminum alloy, stainless steel, superalloy and magnesium alloy. [0003] Tee fittings (Tee) are important and widely used fittings in oil and gas pipeline engineering. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54B22F10/28B22F10/85B22F5/12B33Y70/00B33Y80/00B33Y10/00B33Y50/02
CPCC22C38/02C22C38/04C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54B22F5/106B33Y70/00B33Y80/00B33Y10/00B33Y50/02B22F10/00B22F12/90B22F10/25B22F12/20Y02P10/25
Inventor 吉玲康胡美娟马秋荣卢迪刘迎来严连菊
Owner BC P INC CHINA NAT PETROLEUM CORP
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